Have you tried connecting the digital optical cable from the television to the Home theater system? If you have the port avaliable, this would be the best way to connect.

When you press the function button does it not switch to D.IN? It should switch over without any trouble.

I would recommend making sure that the firmware is completely up to date on the player as well.
http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx=553961&modelname=HT-H5500W&modelcode=HT-H5500W/ZA

Regards,

HD Tech